EP2122783B1 - Sensor module with a plug-type connector coupling - Google Patents

Sensor module with a plug-type connector coupling Download PDF

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Publication number
EP2122783B1
EP2122783B1 EP07857279.9A EP07857279A EP2122783B1 EP 2122783 B1 EP2122783 B1 EP 2122783B1 EP 07857279 A EP07857279 A EP 07857279A EP 2122783 B1 EP2122783 B1 EP 2122783B1
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Prior art keywords
connector element
sensor
sensor module
energy
secondary connector
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German (de)
French (fr)
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EP2122783A1 (en
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Wolfgang Babel
Torsten Pechstein
Detlev Wittmer
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Endress and Hauser Conducta GmbH and Co KG
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Endress and Hauser Conducta Gesellschaft fuer Mess und Regeltechnik mbH and Co KG
Endress and Hauser Conducta GmbH and Co KG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D3/00—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups
    • G01D3/08—Indicating or recording apparatus with provision for the special purposes referred to in the subgroups with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/283—Means for supporting or introducing electrochemical probes
    • G01N27/286—Power or signal connectors associated therewith

Definitions

  • the invention relates to a connector coupling for a sensor module or a sensor, in particular a connector coupling with a galvanically isolated interface for energy and data and a sensor module with such a connector coupling.
  • Such connector couplings comprise a primary-side connector element and a secondary-side connector element, wherein the secondary-side connector element is arranged on the sensor side, the primary-side connector element is assigned to a higher-order unit for operating the sensor, and the primary-side connector element can be detachably coupled to the secondary-side connector element in order to connect the sensor to the sensor to connect the parent unit.
  • Such connector couplings are for example in the patent DE 197 19 730 C1 , and the disclosures DE 100 55 090 A1 respectively. DE102 18 606 A1 disclosed. Sensors with generic connector couplings are sold by the applicant under the mark Memosens ®.
  • the EP 0299863 discloses a device for communicating energy and data between the surface and a device in a borehole by means of electromagnetic connection means. This is achieved with a first (inner) and a second (outer) induction coil, wherein the first coil can be moved from a position separate from the second coil to an operating position in which the coils are arranged coaxially with each other around the devices on the surface to connect with devices in the borehole.
  • the coils are located on an inner or outer core of ferrite materials so that radial and longitudinal deviations from the ideal arrangement of the coils to each other not unduly influence the transport of electrical energy.
  • the galvanically isolated interface usually comprises an inductive interface for feeding the sensor by means of an energy signal, in particular an AC signal.
  • the transmission of data that is to say measurement data or configuration and parameterization data, can take place for example via the same inductive interface by modulation of the energy signal.
  • the connector couplings according to the prior art and the sensor modules equipped therewith have the following problem. There may be situations in which the primary-side connector element is not available for the supply of the secondary-side connector element and thus the sensor.
  • a failure of the primary-side connector coupling or the parent unit can lead to an interruption of the power supply of the secondary-side connector element and the associated sensor.
  • disrupted power supply in some sensor types sensor functions that require a permanent power supply includes, for example, the maintenance of the polarization voltage in amperometric sensors.
  • the object is achieved by the secondary-side connector element according to independent claim 1 and the sensor module according to independent claim 20.
  • a connector coupling for connecting a sensor to a higher-level unit for operating the sensor comprises a primary-side connector element and the secondary-side connector element according to the invention, wherein the secondary-side connector element is arranged on the sensor side, the primary-side connector element is assigned to the superordinated unit, the connector coupling has a galvanically isolated interface between the primary-side connector element and the secondary-side connector element, via which the secondary-side connector element can be supplied with a power supply signal, and via which a data exchange between the two connector elements can take place, the secondary-side connector element a power supply unit which generates from the power supply signal the required supply voltages for components of the secondary-side connector element and possibly for the sensor, an A / D converter for converting an analog measuring signal of the sensor, a data memory for storing sensor data, and a microprocessor for controlling the communication between the secondary-side connector element and the primary-side connector element and / or for processing the digitized sensor signal, furthermore the power supply unit has an energy store in order to ensure the power supply at least
  • the energy store is preferably a loadable during operation of the connector coupling energy storage, it may for example comprise a capacitor, in particular a so-called gold cap, or an accumulator.
  • the energy supply unit may for this purpose comprise a suitable charging circuit.
  • the power supply unit comprises in one embodiment Current limiter or voltage limiter for the output of the energy storage electric power to ensure intrinsic safety in the sense of the ignition protection Ex-i of the connector coupling.
  • the energy store may for example be dimensioned so that the operation of the secondary-side connector element and possibly the sensor element at least 10 minutes, preferably at least one hour, more preferably at least 4 hours maintains.
  • a time interval can be predetermined or predefinable, for which the operation is to be maintained.
  • the microprocessor determines the microprocessor based on the time interval and possibly the state of charge of the energy storage, the amount of functions that can be maintained over the time interval. For this purpose, the functions of the components of the secondary-side connector coupling can be prioritized according to their importance for the operation of the secondary-side connector coupling and possibly the sensor.
  • One of the functions to be maintained of the secondary-side connector element and the sensor is, for example, the measured-value acquisition, wherein the acquired measured values are initially not transferred but temporarily stored.
  • the cached measured values are transmitted via the interface to the higher-level unit.
  • the microprocessor can determine the rate with which measured values can be determined and stored.
  • the digitizing raw data can be processed and then transferred to the higher-level unit.
  • the measured values are each assigned the time of the measurement, wherein the time can be stored explicitly, or results from the position of a measured value in the sequence of the stored measured values.
  • the energy store can serve to maintain essential sensor functions, for example the polarization voltage of an amperometric sensor.
  • the prioritization of the individual functions of the components of the secondary-side connector element can be predetermined and possibly variable by the user.
  • the secondary-side connector element can either explicitly the estimated time for an imminent Interrupt signaled or the nature of the action can be communicated, for example via an index, resulting in the secondary-side connector element based on stored data, the expected duration of the interruption.
  • the higher-level unit may be a transmitter or a field bus which is connected to a digital control device.
  • the galvanically isolated interface usually comprises an inductive interface for feeding the sensor by means of an energy signal, for example an AC signal.
  • the transmission of data so measurement data or configuration and parameterization, for example, by modulation of the energy signal, wherein the transmission of data from the secondary-side connector element to the primary-side connector element can be done by load modulation of the energy signal.
  • the transmission of data from the secondary-side connector element to the primary-side connector element by the power supply signal is interrupted from the primary side, and be transmitted from the secondary-side connector element data actively, for example by modulation of an AC-carrier signal transmitted from the secondary side connector element.
  • the energy for this is provided by the energy store.
  • the sensor module according to the invention comprises a secondary-side connector element according to the invention of a connector coupling, and a sensor which is permanently connected to the secondary-side connector element for a user, wherein the secondary-side connector element contains sensor-specific data in its data memory, and is provided for operating the sensor.
  • the sensor can be, for example, an analysis sensor of industrial process measurement technology, in particular a potentiometric sensor, an amperometric sensor, a photometric sensor, a spectrometric sensor, or a conductivity sensor.
  • the potentiometric sensors comprise, in particular, pH sensors or sensors for determining redox potentials.
  • sensor module 1 comprises a secondary-side connector element 2 and a pH sensor 10 which is non-detachably and sealed against contamination with a housing 11 of the secondary-side connector element.
  • the housing 11 has in particular the shape of a plug-in head, which is arranged at an axial end portion of a substantially cylindrical sensor is, and projects beyond the sensor in the radial direction by no more than the simple cylinder radius.
  • the secondary-side connector element 2 comprises in its housing 11 an electronic circuit for processing the measurement signals of the pH sensor 10.
  • the circuit comprises an A / D converter 12 which digitizes the analog signals of the pH sensor and a microprocessor 13 for further processing.
  • the processed by the microprocessor measurement data are transmitted in normal operation to a primary-side connector element 3, for example by load modulation of an AC carrier signal, which is transmitted from the primary-side connector element 3 to the secondary-side connector element 2 via an inductive interface 17. From there, the data is forwarded to a higher-level unit 4, for example to a transmitter.
  • a higher-level unit 4 for example to a transmitter.
  • suitable demodulators are provided in the primary-side connector element. Accordingly, the primary-side connector element on modulators to transmit control signals via the interface to the sensor module, more precisely to the secondary-side connector element 2, where a corresponding demodulator is provided.
  • the secondary-side connector element 2 further comprises a data memory in which on the one hand sensor-specific data, in particular sensor identity, calibration data and parameterization data are stored, and on the other hand measurement data can be stored.
  • the microprocessor 13 is powered by a power supply unit 15.
  • the power supply unit includes, among other things, a rectifier circuit that rectifies the AC carrier signal to provide the supply voltages to the electronic circuitry of the secondary connector element.
  • the energy supply unit 15 further comprises an energy store 16, with a battery and / or a gold-cap capacitor, the energy store 16 in the normal Operation of the sensor module is kept in the charged state.
  • the power supply of the components of the electronic circuit is performed by the energy storage.
  • the microprocessor 13 uses the available energy and a predetermined duration without AC carrier signal to determine the rate at which the measured data can be determined at regular intervals over the specified duration.
  • the measured data determined are stored in the memory 14 and are read out of the memory only after the AC carrier signal has reappeared and transmitted to the primary-side connector element.

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Description

Die Erfindung betrifft eine Steckverbinderkupplung für ein Sensormodul bzw. einen Sensor, insbesondere eine Steckverbinderkupplung mit einer galvanisch getrennten Schnittstelle für Energie und Daten und ein Sensormodul mit einer solchen Steckverbinderkupplung.The invention relates to a connector coupling for a sensor module or a sensor, in particular a connector coupling with a galvanically isolated interface for energy and data and a sensor module with such a connector coupling.

Derartige Steckverbinderkupplungen umfassen ein primärseitiges Steckverbinderelement und ein sekundärseitiges Steckverbinderelement, wobei das sekundärseitige Steckverbinderelement sensorseitig angeordnet ist, das primärseitige Steckverbinderelement einer übergeordneten Einheit zum Betreiben des Sensors zugeordnet ist, und das primärseitige Steckverbinderelement mit dem sekundärseitigen Steckverbinderelement lösbar gekoppelt werden kann, um den Sensor an die übergeordnete Einheit anzuschließen.Such connector couplings comprise a primary-side connector element and a secondary-side connector element, wherein the secondary-side connector element is arranged on the sensor side, the primary-side connector element is assigned to a higher-order unit for operating the sensor, and the primary-side connector element can be detachably coupled to the secondary-side connector element in order to connect the sensor to the sensor to connect the parent unit.

Derartige Steckverbinderkupplungen sind beispielsweise in dem Patent DE 197 19 730 C1 , und den Offenlegungsschriften DE 100 55 090 A1 bzw. DE102 18 606 A1 offenbart. Sensoren mit gattungsgemäßen Steckverbinderkupplungen werden von der Anmelderin unter der Marke Memosens® vertrieben.Such connector couplings are for example in the patent DE 197 19 730 C1 , and the disclosures DE 100 55 090 A1 respectively. DE102 18 606 A1 disclosed. Sensors with generic connector couplings are sold by the applicant under the mark Memosens ®.

Beschreibungdescription

Die EP 0299863 offenbart eine Vorrichtung zur Übermittlung von Energie und Daten zwischen der Oberfläche und einem Gerät in einem Bohrloch mittel elektromagnetischer Verbindungsmittel. Dies wird erreicht mit einer ersten (inneren) und einer zweiten (äußeren) Induktionsspule, wobei die erste Spule von einer von der zweiten Spule getrennten Position zu einer Betriebsposition bewegt werden kann, in der die Spulen koaxial zueinander angeordnet sind um die Geräte an der Oberfläche mit Geräten im Bohrloch zu verbinden. Die Spulen befinden sich auf einem inneren bzw. äußeren Kern aus Ferritmaterialien damit radiale und longitudinale Abweichungen aus der idealen Anordnung der Spulen zueinander den Transport von elektrischer Energie nicht unzulässig beeinflussen.The EP 0299863 discloses a device for communicating energy and data between the surface and a device in a borehole by means of electromagnetic connection means. This is achieved with a first (inner) and a second (outer) induction coil, wherein the first coil can be moved from a position separate from the second coil to an operating position in which the coils are arranged coaxially with each other around the devices on the surface to connect with devices in the borehole. The coils are located on an inner or outer core of ferrite materials so that radial and longitudinal deviations from the ideal arrangement of the coils to each other not unduly influence the transport of electrical energy.

Die galvanisch getrennte Schnittstelle umfasst gewöhnlich eine induktive Schnittstelle zum Speisen des Sensors mittels eines Energiesignals, insbesondere eines AC-Signals. Die Übertragung von Daten, also Messdaten bzw. Konfigurier- und Parametrierdaten, kann beispielsweise über die gleiche induktive Schnittstelle durch Modulation des Energiesignals erfolgen.The galvanically isolated interface usually comprises an inductive interface for feeding the sensor by means of an energy signal, in particular an AC signal. The transmission of data, that is to say measurement data or configuration and parameterization data, can take place for example via the same inductive interface by modulation of the energy signal.

Die Steckverbinderkupplungen nach dem Stand der Technik und die damit ausgestatteten Sensormodule weisen jedoch das folgende Problem auf. Es kann zu Situationen kommen, bei denen das primärseitige Steckverbinderelement nicht zur Versorgung des sekundärseitigen Steckverbinderelements und damit des Sensors zur Verfügung steht.However, the connector couplings according to the prior art and the sensor modules equipped therewith have the following problem. There may be situations in which the primary-side connector element is not available for the supply of the secondary-side connector element and thus the sensor.

Dies ist beispielsweise dann der Fall, wenn das primärseitige Steckverbinderelement vom sekundärseitigen Steckverbinderelement abgezogen wird, um mittels eines Simulators Testsignale in die Schnittstelle des primärseitigen Steckverbinderelements einzuspeisen, um die Signalübertragung vom primärseitigen Steckverbinderelement zur übergeordneten Einheit zu überprüfen, oder um die Antwort einer Anlage auf einen bestimmten Messwertverlauf zu testen. Derartige Simulatoren sind beispielsweise in der noch unveröffentlichten deutschen Patentanmeldung "Sensorsimulator" mit dem Aktenzeichen 102005041427 offenbart.This is the case, for example, when the primary-side connector element from the secondary-side connector element is withdrawn in order to feed test signals into the interface of the primary-side connector element by means of a simulator in order to check the signal transmission from the primary-side connector element to the higher-level unit or to test the response of a system to a specific measured value profile. Such simulators are, for example, in the still unpublished German patent application "sensor simulator" with the file number 102005041427 disclosed.

Weiterhin kann ein Ausfall der primärseitigen Steckverbinderkupplung oder der übergeordneten Einheit zu einer Unterbrechung der Energieversorgung des sekundärseitigen Steckverbinderelements und des damit verbundenen Sensors führen.Furthermore, a failure of the primary-side connector coupling or the parent unit can lead to an interruption of the power supply of the secondary-side connector element and the associated sensor.

Dies bedingt einerseits den Verlust an Messdaten von der Messstelle des Sensors für die Zeit der Versorgungsunterbrechung, andererseits wird ein Neustart des Sensors erforderlich, wenn die Versorgung des Sensors nach einer Unterbrechung wieder aufgenommen wird. Zudem werden bei einer Unterbrechung der Energieversorgung bei einigen Sensortypen Sensorfunktionen gestört, die eine dauerhafte Energieversorgung benötigen, hierzu gehört beispielsweise die Aufrechterhaltung der Polarisationsspannung bei amperometrischen Sensoren.This requires on the one hand the loss of measurement data from the measuring point of the sensor for the time of supply interruption, on the other hand, a restart of the sensor is required if the supply of the sensor is resumed after an interruption. In addition, disrupted power supply in some sensor types sensor functions that require a permanent power supply, this includes, for example, the maintenance of the polarization voltage in amperometric sensors.

Es ist daher die Aufgabe der vorliegenden Erfindung, ein sekundärseitiges Steckverbinderelement einer Steckverbinderkuplung für einen Sensor und ein Sensormodul mit einem solchen sekundärseitigen Steckverbinderelement bereitzustellen, welches die Nachteile des Stands der Technik überwindet.It is therefore the object of the present invention to provide a secondary-side connector element of a connector coupler for a sensor and a sensor module with such a secondary-side connector element, which overcomes the disadvantages of the prior art.

Die Aufgabe wird erfindungsgemäß gelöst durch das sekundärseitige Steckverbinderelement gemäß des unabhängigen Patentanspruchs 1 und das Sensormodul gemäß des unabhängigen Patentanspruchs 20.The object is achieved by the secondary-side connector element according to independent claim 1 and the sensor module according to independent claim 20.

Eine Steckverbinderkupplung zum Anschluss eines Sensors an eine übergeordnete Einheit zum Betreiben des Sensors umfasst ein primärseitiges Steckverbinderelement und das erfindungsgemäße sekundärseitige Steckverbinderelement, wobei
das sekundärseitige Steckverbinderelement sensorseitig angeordnet ist,
das primärseitige Steckverbinderelement der übergeordneten Einheit zugeordnet ist,
die Steckverbinderkupplung eine galvanisch getrennte Schnittstelle zwischen dem primärseitigen Steckverbinderelement und dem sekundärseitigen Steckverbinderelement aufweist, über welche das sekundärseitige Steckverbinderelement mit einem Energieversorgungssignal versorgbar ist, und über welche ein Datenaustausch zwischen den beiden Steckverbinderelementen erfolgen kann,
das sekundärseitige Steckverbinderelement
eine Energieversorgungseinheit umfasst, welche aus dem Energieversorgungssignal die erforderlichen Versorgungsspannungen für Komponenten des sekundärseitigen Steckverbinderelements und ggf. für den Sensor generiert,
einen A/D-Wandler zur Wandlung eines analogen Messsignals des Sensors,
einen Datenspeicher zur Speicherung von Sensordaten, und
einen Mikroprozessor zur Steuerung der Kommunikation zwischen dem sekundärseitigen Steckverbinderelement und dem primärseitigen Steckverbinderelement und/oder zur Aufbereitung des digitalisierten Sensorsignals aufweist,
wobei ferner
die Energieversorgungseinheit einen Energiespeicher aufweist, um während einer Unterbrechung des Energieversorgungssignals die Energieversorgung zumindest für ausgewählte Komponenten des sekundärseitigen Steckverbinderelements und ggf. des Sensors für eine begrenzte Zeit zu gewährleisten.A connector coupling for connecting a sensor to a higher-level unit for operating the sensor comprises a primary-side connector element and the secondary-side connector element according to the invention, wherein
the secondary-side connector element is arranged on the sensor side,
the primary-side connector element is assigned to the superordinated unit,
the connector coupling has a galvanically isolated interface between the primary-side connector element and the secondary-side connector element, via which the secondary-side connector element can be supplied with a power supply signal, and via which a data exchange between the two connector elements can take place,
the secondary-side connector element
a power supply unit which generates from the power supply signal the required supply voltages for components of the secondary-side connector element and possibly for the sensor,
an A / D converter for converting an analog measuring signal of the sensor,
a data memory for storing sensor data, and
a microprocessor for controlling the communication between the secondary-side connector element and the primary-side connector element and / or for processing the digitized sensor signal,
furthermore
the power supply unit has an energy store in order to ensure the power supply at least for selected components of the secondary-side plug connector element and possibly the sensor for a limited time during an interruption of the power supply signal.

Der Energiespeicher ist vorzugsweise ein während des Betriebs der Steckverbinderkupplung ladbarer Energiespeicher, er kann beispielsweise einen Kondensator umfassen, insbesondere einen so genannten Gold-Cap, oder einen Akkumulator. Die Energieversorgungseinheit kann hierzu eine geeignete Ladeschaltung umfassen.The energy store is preferably a loadable during operation of the connector coupling energy storage, it may for example comprise a capacitor, in particular a so-called gold cap, or an accumulator. The energy supply unit may for this purpose comprise a suitable charging circuit.

Die Energieversorgungseinheit umfasst in einer Ausgestaltung Strombegrenzer bzw. Spannungsbegrenzer für die von dem Energiespeicher abgegebene elektrische Leistung, um die Eigensicherheit im Sinne der Zündschutzart Ex-i der Steckverbinderkupplung zu gewährleisten.The power supply unit comprises in one embodiment Current limiter or voltage limiter for the output of the energy storage electric power to ensure intrinsic safety in the sense of the ignition protection Ex-i of the connector coupling.

Der Energiespeicher kann beispielsweise so dimensioniert sein, dass der Betrieb des sekundärseitigen Steckverbinderelements und ggf. des Sensorelements mindestens 10 Minuten, vorzugsweise mindestens eine Stunde, weiter bevorzugt mindestens 4 Stunden aufrechterhält.The energy store may for example be dimensioned so that the operation of the secondary-side connector element and possibly the sensor element at least 10 minutes, preferably at least one hour, more preferably at least 4 hours maintains.

In einer Weiterbildung der Erfindung kann ein Zeitintervall vorgegeben oder vorgebbar sein, sein für das der Betrieb aufrechterhalten werden soll.In one development of the invention, a time interval can be predetermined or predefinable, for which the operation is to be maintained.

In einer Ausgestaltung dieser Weiterbildung der Erfindung ermittelt der Mikroprozessor anhand des Zeitintervalls und ggf. des Ladezustands des Energiespeichers, den Umfang von Funktionen, die über das Zeitintervall aufrechterhalten werden können. Hierzu können die Funktionen der Komponenten der sekundärseitigen Steckverbinderkupplung nach Ihrer Bedeutung für den Betrieb der sekundärseitigen Steckverbinderkupplung und ggf. des Sensors priorisiert sein.In one embodiment of this development of the invention determines the microprocessor based on the time interval and possibly the state of charge of the energy storage, the amount of functions that can be maintained over the time interval. For this purpose, the functions of the components of the secondary-side connector coupling can be prioritized according to their importance for the operation of the secondary-side connector coupling and possibly the sensor.

Eine der aufrechtzuerhaltenden Funktionen des sekundärseitigen Steckverbinderelements und des Sensors ist beispielsweise die Messwerterfassung, wobei die erfassten Messwerte zunächst nicht übertragen sondern zwischengespeichert werden.One of the functions to be maintained of the secondary-side connector element and the sensor is, for example, the measured-value acquisition, wherein the acquired measured values are initially not transferred but temporarily stored.

Erst nach Wiederherstellung der Energieversorgung über das Energieversorgungssignal erfolgt die Übertragung der zwischengespeicherten Messwerte über die Schnittstelle an die übergeordnete Einheit.Only after restoration of the power supply via the power supply signal, the cached measured values are transmitted via the interface to the higher-level unit.

In Abhängigkeit der verfügbaren Energie und der Länge des vorgegebenen Zeitintervalls kann der Mikroprozessor ermitteln, mit welcher Rate Messwerte ermittelt und gespeichert werden können.Depending on the available energy and the length of the given time interval, the microprocessor can determine the rate with which measured values can be determined and stored.

Gleichermaßen können zunächst nur digitalisierte Rohdaten des Sensorsignals, die ggf. zeitlich gemittelt sind ohne weitere Aufbereitung zwischengespeichert werden, um den Energiebedarf zu begrenzen.Similarly, initially only digitized raw data of the sensor signal, which are possibly averaged over time, can be temporarily stored without further processing in order to limit the energy requirement.

Nach Wiederherstellung der Energieversorgung durch das Energieversorgungssignal des primärseitigen Steckverbinderelements können die digitalisieren Rohdaten verarbeitet und anschließend zur übergeordneten Einheit übertragen werden.After restoration of the power supply by the power supply signal of the primary-side connector element The digitizing raw data can be processed and then transferred to the higher-level unit.

Den Messwerten ist jeweils der Zeitpunkt der Messung zugeordnet, wobei der Zeit explizit gespeichert sein kann, oder sich aus der Position eines Messwerts in der Sequenz der gespeicherten Messwerte ergibt.The measured values are each assigned the time of the measurement, wherein the time can be stored explicitly, or results from the position of a measured value in the sequence of the stored measured values.

In einer Weiterbildung der Erfindung kann der Energiespeicher dazu dienen, essentielle Sensorfunktionen aufrechtzuerhalten, beispielsweise die Polarisationsspannung eines amperometrischen Sensors.In one development of the invention, the energy store can serve to maintain essential sensor functions, for example the polarization voltage of an amperometric sensor.

Die Priorisierung der einzelnen Funktionen der Komponenten des sekundärseitigen Steckverbinderelements kann vorgegeben und ggf. vom Benutzer veränderlich sein.The prioritization of the individual functions of the components of the secondary-side connector element can be predetermined and possibly variable by the user.

Sofern die Unterbrechung des Energieversorgungssignals durch einen kontrollierten Eingriff in die Messstelle erfolgt, und die Dauer der Unterbrechung abschätzbar ist, beispielsweise im Zusammenhang mit einer Wartungsmaßnahme an der übergeordneten Einheit oder an dem primärseitigen Steckverbinderelement, kann dem sekundärseitigen Steckverbinderelement entweder explizit die geschätzte Zeitdauer für eine bevorstehende Unterbrechung signalisiert werden, oder es kann die Art der Maßnahme beispielsweise über einen Index mitgeteilt werden, woraus sich für das sekundärseitige Steckverbinderelement von anhand von gespeicherten Daten, die zu erwartende Dauer der Unterbrechung ergibt.If the interruption of the power supply signal by a controlled intervention in the measuring point, and the duration of the interruption can be estimated, for example in connection with a maintenance action on the parent unit or on the primary-side connector element, the secondary-side connector element can either explicitly the estimated time for an imminent Interrupt signaled or the nature of the action can be communicated, for example via an index, resulting in the secondary-side connector element based on stored data, the expected duration of the interruption.

Die übergeordnete Einheit kann insbesondere ein Messumformer oder ein Feldbus sein, der mit einer digitalen Steuerungseinrichtung verbunden ist.In particular, the higher-level unit may be a transmitter or a field bus which is connected to a digital control device.

Die galvanisch getrennte Schnittstelle umfasst gewöhnlich eine induktive Schnittstelle zur Speisung des Sensors mittels eines Energiesignals beispielsweise eines AC-Signals. Die Übertragung von Daten, also Messdaten bzw. Konfigurier- und Parametrierdaten, kann beispielsweise durch Modulation des Energiesignals erfolgen, wobei die Übertragung von Daten vom sekundärseitigen Steckverbinderelement zum primärseitigen Steckverbinderelement durch Lastmodulation des Energiesignals erfolgen kann.The galvanically isolated interface usually comprises an inductive interface for feeding the sensor by means of an energy signal, for example an AC signal. The transmission of data, so measurement data or configuration and parameterization, for example, by modulation of the energy signal, wherein the transmission of data from the secondary-side connector element to the primary-side connector element can be done by load modulation of the energy signal.

Zur Trennung von Daten und Energie sind entsprechende Demodulatoren bzw. Filter vorgesehen. Einzelheiten hierzu sind beispielsweise in dem Patent DE 197 19 730 C1 offenbart.For the separation of data and energy corresponding demodulators or filters are provided. Details are for example in the patent DE 197 19 730 C1 disclosed.

In einer Weiterbildung der Erfindung erfolgt die Übertragung von Daten vom sekundärseitigen Steckverbinderelement zum primärseitigen Steckverbinderelement, indem das Energieversorgungssignal von der Primärseite unterbrochen wird, und von dem sekundärseitigen Steckverbinderelement Daten aktiv übertragen werden, beispielsweise durch Modulation eines vom sekundärseitigen Steckverbinderelement gesendeten AC-Trägersignals. Die Energie hierzu wird von dem Energiespeicher bereitgestellt.In one embodiment of the invention, the transmission of data from the secondary-side connector element to the primary-side connector element by the power supply signal is interrupted from the primary side, and be transmitted from the secondary-side connector element data actively, for example by modulation of an AC-carrier signal transmitted from the secondary side connector element. The energy for this is provided by the energy store.

Das erfindungsgemäße Sensormodul umfasst ein erfindungsgemäßes sekundärseitiges Steckverbinderelement einer Steckverbinderkupplung, und einen Sensor der für einen Anwender unlösbar mit dem sekundärseitigen Steckverbinderelement verbunden ist, wobei das sekundärseitige Steckverbinderelement in seinem Datenspeicher sensorspezifische Daten enthält, und zum Betreiben des Sensors vorgesehen ist.The sensor module according to the invention comprises a secondary-side connector element according to the invention of a connector coupling, and a sensor which is permanently connected to the secondary-side connector element for a user, wherein the secondary-side connector element contains sensor-specific data in its data memory, and is provided for operating the sensor.

Der Sensor kann beispielsweise ein Analysesensor der industriellen Prozessmesstechnik sein, insbesondere ein potentiometrischer Sensor, ein amperometrischer Sensor, ein photometrischer Sensor, ein spektrometrischer Sensor, oder ein Leitfähigkeitssensor.The sensor can be, for example, an analysis sensor of industrial process measurement technology, in particular a potentiometric sensor, an amperometric sensor, a photometric sensor, a spectrometric sensor, or a conductivity sensor.

Die potentiometrischen Sensoren umfassen insbesondere pH-Sensoren oder Sensoren zur Bestimmung von Redox-Potentialen.The potentiometric sensors comprise, in particular, pH sensors or sensors for determining redox potentials.

Die Erfindung wird nun anhand eines in der Zeichnung dargestellten Ausführungsbeispiels erläutert.The invention will now be explained with reference to an embodiment shown in the drawing.

Es zeigt:

  • Fig. 1: ein schematisches Blockschaltbild eines erfindungsgemäßen Sensormoduls.
It shows:
  • Fig. 1 : a schematic block diagram of a sensor module according to the invention.

Das in Fig. 1 dargestellte Sensormodul 1 umfasst ein sekundärseitiges Steckverbinderelement 2 und einen pH-Sensor 10, welcher unlösbar und dicht gegen Verschmutzungen mit einem Gehäuse 11 des sekundärseitigen Steckverbinderelements verbunden ist. Das Gehäuse 11 hat insbesondere die Gestalt eines Steckkopfes, der an einem axialen Endabschnitt eines im wesentlichen zylinderförmigen Sensors angeordnet ist, und der den Sensor in radialer Richtung um nicht mehr als den einfachen Zylinderradiusradius überragt.This in Fig. 1 shown sensor module 1 comprises a secondary-side connector element 2 and a pH sensor 10 which is non-detachably and sealed against contamination with a housing 11 of the secondary-side connector element. The housing 11 has in particular the shape of a plug-in head, which is arranged at an axial end portion of a substantially cylindrical sensor is, and projects beyond the sensor in the radial direction by no more than the simple cylinder radius.

Das sekundärseitige Steckverbinderelement 2 umfasst in seinem Gehäuse 11 eine elektronische Schaltung zur Verarbeitung der Messsignale des pH-Sensors 10. Die Schaltung umfasst einen A/D-Wandler 12, welcher die Analogsignale des pH-Sensors digitalisiert und einem Mikroprozessor 13 zur weiteren Verarbeitung zuführt. Die vom Mikroprozessor aufbereiteten Messdaten werden im normalen Betrieb an eine primärseitiges Steckverbinderelement 3 übermittelt, beispielsweise durch Lastmodulation eines AC-Trägersignals, welches vom primärseitigen Steckverbinderelement 3 zum sekundärseitigen Steckverbinderelement 2 über eine induktive Schnittstelle 17 übertragen wird. Von dort werden die Daten an eine übergeordnete Einheit 4 weitergeleitet, beispielsweise an einen Messumformer. Als physikalisches Format der Kommunikation zwischen dem primärseitigen Steckverbinderelement 3 und der übergeordneten Einheit 4 ist u.a. RS485 geeignet. Zur Trennung von Daten und Trägersignal sind im primärseitigen Steckverbinderelement 3 geeignete Demodulatoren vorgesehen. Entsprechend weist das primärseitige Steckverbinderelement Modulatoren auf, um Steuersignale über die Schnittstelle zum Sensormodul, genauer zum sekundärseitigen Steckverbinderelement 2 zu übertragen, wo ein entsprechender Demodulator vorgesehen ist.The secondary-side connector element 2 comprises in its housing 11 an electronic circuit for processing the measurement signals of the pH sensor 10. The circuit comprises an A / D converter 12 which digitizes the analog signals of the pH sensor and a microprocessor 13 for further processing. The processed by the microprocessor measurement data are transmitted in normal operation to a primary-side connector element 3, for example by load modulation of an AC carrier signal, which is transmitted from the primary-side connector element 3 to the secondary-side connector element 2 via an inductive interface 17. From there, the data is forwarded to a higher-level unit 4, for example to a transmitter. As the physical format of the communication between the primary-side connector element 3 and the superordinate unit 4, there is, inter alia. RS485 suitable. For the separation of data and carrier signal 3 suitable demodulators are provided in the primary-side connector element. Accordingly, the primary-side connector element on modulators to transmit control signals via the interface to the sensor module, more precisely to the secondary-side connector element 2, where a corresponding demodulator is provided.

Das sekundärseitige Steckverbinderelement 2 umfasst weiterhin einen Datenspeicher, in dem einerseits sensorspezifische Daten, insbesondere Sensoridentität, Kalibrierdaten und Parametrierdaten abgelegt sind, und andererseits Messdaten gespeichert werden können.The secondary-side connector element 2 further comprises a data memory in which on the one hand sensor-specific data, in particular sensor identity, calibration data and parameterization data are stored, and on the other hand measurement data can be stored.

Der Mikroprozessor 13 wird über eine Energieversorgungseinheit 15 gespeist. Die Energieversorgungseinheit umfasst u.a. eine Gleichrichterschaltung, die das AC-Trägersignal gleichrichtet, um die Versorgungsspannungen für die elektronische Schaltung des sekundären Steckverbinderelements bereitzustellen. Die Energieversorungseinheit 15 umfasst weiterhin einen Energiespeicher 16, mit einer Batterie und/oder einem Gold-Cap Kondensator, wobei der Energiespeicher 16 im normalen Betrieb des Sensormoduls im geladenen Zustand gehalten wird.The microprocessor 13 is powered by a power supply unit 15. The power supply unit includes, among other things, a rectifier circuit that rectifies the AC carrier signal to provide the supply voltages to the electronic circuitry of the secondary connector element. The energy supply unit 15 further comprises an energy store 16, with a battery and / or a gold-cap capacitor, the energy store 16 in the normal Operation of the sensor module is kept in the charged state.

Bei Ausfall des AC-Trägersignals erfolgt die Energieversorgung der Komponenten der elektronischen Schaltung durch den Energiespeicher. Der Mikroprozessur 13 ermittelt anhand der verfügbaren Energie und einer vorgegebenen Dauer ohne AC-Trägersignal die Rate mit der Messdaten in gleichmäßigen Abständen über die vorgegebene Dauer ermittelt werden können. Die ermittelten Messdaten werden im Speicher 14 hinterlegt und erst nach erneutem Auftreten des AC-Trägersignals aus dem Speicher ausgelesen und zum primärseitigen Steckverbinderelement übertragen.In case of failure of the AC carrier signal, the power supply of the components of the electronic circuit is performed by the energy storage. The microprocessor 13 uses the available energy and a predetermined duration without AC carrier signal to determine the rate at which the measured data can be determined at regular intervals over the specified duration. The measured data determined are stored in the memory 14 and are read out of the memory only after the AC carrier signal has reappeared and transmitted to the primary-side connector element.

Claims (14)

  1. Sensor module (1) with a secondary connector element (2) of a connector coupling and a sensor (10) for connection to a higher-order unit (4) designed to operate the sensor, wherein the connector coupling has a primary connector element (3) and the secondary connector element (2), said secondary connector element (2) being arranged on the sensor side, said primary connector element (3) being assigned to the higher-order unit (4), the connector coupling having a galvanically isolated interface (17) between the primary connector element (3) and the secondary connector element (2), via which an energy supply signal can be supplied to the secondary connector element (2), and via which data can be exchanged between the two connector elements (2, 3), wherein
    the secondary connector element (2) has
    an energy supply unit (15), which generates the necessary supply voltages for the components of the secondary connector element (2) and for the sensor (10) from the energy supply signal,
    an A/D converter (12) for converting an analog measuring signal of the sensor (10), a data memory (14) for storing sensor data, and
    a microprocessor (13) for controlling the communication between the secondary connector element (2) and the primary connector element (3) and/or for conditioning the digitized sensor signal,
    wherein the energy supply unit (15) further has an energy storage unit (16) to guarantee the supply of energy for a limited time at least for selected components of the secondary connector element (2) and of the sensor (10) should the energy supply signal be interrupted,
    characterized in that
    the sensor (10) is designed as a pH sensor which is connected to the housing (11) of the secondary connector element (2) in a non-detachable manner and a manner sealed against impurities.
  2. Sensor module (1) as claimed in Claim 1, wherein the energy storage unit (16) is an energy storage unit which can be charged while the connector coupling system is in operation.
  3. Sensor module (1) as claimed in Claim 1 or 2, wherein the energy storage unit is a capacitor, particularly a Gold Cap capacitor, or a storage battery.
  4. Sensor module (1) as claimed in one of the previous claims, wherein the energy storage unit has current limiters or voltage limiters for the electrical power given by the energy storage unit.
  5. Sensor module (1) as claimed in one of the previous claims, wherein the energy storage unit is sized in such a way that it maintains the operation of the secondary connector element and the sensor for at least 10 minutes, preferably for at least one hour and most preferably for at least 4 hours following an interruption to the energy supply.
  6. Sensor module (1) as claimed in one of the previous claims, wherein a time interval is pre-defined or predefinable for which operation should be maintained following an interruption to the energy supply.
  7. Sensor module (1) as claimed in Claim 6, wherein, on the basis of the time interval and the charging state of the energy storage unit, the microprocessor determines the range of functions that can be maintained over the time interval, wherein the functions of the components of the secondary connector coupling are prioritized according to their importance for the operation of the secondary connector coupling.
  8. Sensor module (1) as claimed in one of the previous claims, wherein measured value acquisition is maintained while the energy supply signal is interrupted, and the recorded measured values are initially not transmitted and are instead buffered in the data memory, wherein, once the energy supply is restored via the energy supply signal, the buffered measured values are transmitted via the interface to the higher-order unit.
  9. Sensor module (1) as claimed in Claim 7 or 8, wherein, depending on the energy available and the length of the predefined interval, the microprocessor determines the frequency at which measured values can be determined and buffered.
  10. sensor module (1) as claimed in Claims 8 or 9, wherein initially only digitized raw data of the sensor signal are saved in order to limit the energy demand.
  11. Sensor module (1) as claimed in one of the previous claim, wherein if the interruption in the energy supply signal is caused by a controlled intervention at the measuring point and the duration of the interruption can be estimated, either the estimated duration of the pending interruption is explicitly signaled to the secondary connector element, or the type of measure is communicated to the secondary connector element, for example, via an index, resulting, on the basis of saved data, in the duration of the interruption for the secondary connector element.
  12. Sensor module (1) as claimed in one of the previous claims, wherein the galvanically isolated interface comprises an inductive interface to supply the secondary connector element with an energy signal, and wherein the transmission of data is performed by modulation of the energy signal.
  13. Sensor module (1) as claimed in one of the previous claims, wherein data are transmitted from the secondary connector element to the primary connector element by interrupting the energy supply signal on the primary side and by actively transmitting data from the secondary connector element.
  14. Sensor module (1) as claimed in one of the previous claims, wherein the secondary connector element has sensor-specific data in its data memory.
EP07857279.9A 2006-12-22 2007-12-06 Sensor module with a plug-type connector coupling Active EP2122783B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610062184 DE102006062184A1 (en) 2006-12-22 2006-12-22 Connector coupling for a sensor module and sensor module with such a connector coupling
PCT/EP2007/063462 WO2008077737A1 (en) 2006-12-22 2007-12-06 Plug-type connector coupling for a sensor module and sensor module with such a plug-type connector coupling

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EP2122783A1 EP2122783A1 (en) 2009-11-25
EP2122783B1 true EP2122783B1 (en) 2016-06-29

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DE102006062184A1 (en) 2008-06-26
WO2008077737A1 (en) 2008-07-03

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